English verb conjugation
COULD PARASAIL

Regular verb: parasail - parasailed - parasailed

Affirmation

Simple form	V-ing form
I could parasail you could parasail he could parasail we could parasail you could parasail they could parasail	I could be parasailing you could be parasailing he could be parasailing we could be parasailing you could be parasailing they could be parasailing
Perfect	V-ing perfect
I could have parasailed you could have parasailed he could have parasailed we could have parasailed you could have parasailed they could have parasailed	I could have been parasailing you could have been parasailing he could have been parasailing we could have been parasailing you could have been parasailing they could have been parasailing

Negation

Simple form	V-ing form
I couldn't parasail you couldn't parasail he couldn't parasail we couldn't parasail you couldn't parasail they couldn't parasail	I couldn't be parasailing you couldn't be parasailing he couldn't be parasailing we couldn't be parasailing you couldn't be parasailing they couldn't be parasailing
Perfect	V-ing perfect
I couldn't have parasailed you couldn't have parasailed he couldn't have parasailed we couldn't have parasailed you couldn't have parasailed they couldn't have parasailed	I couldn't have been parasailing you couldn't have been parasailing he couldn't have been parasailing we couldn't have been parasailing you couldn't have been parasailing they couldn't have been parasailing

Interrogative form

Simple form	V-ing form
could I parasail? could you parasail? could he parasail? could we parasail? could you parasail? could they parasail?	could I be parasailing? could you be parasailing? could he be parasailing? could we be parasailing? could you be parasailing? could they be parasailing?
Perfect	V-ing perfect
could I have parasailed? could you have parasailed? could he have parasailed? could we have parasailed? could you have parasailed? could they have parasailed?	could I have been parasailing? could you have been parasailing? could he have been parasailing? could we have been parasailing? could you have been parasailing? could they have been parasailing?

Interro-negative form

Simple form	V-ing form
couldn't I parasail? couldn't you parasail? couldn't he parasail? couldn't we parasail? couldn't you parasail? couldn't they parasail?	couldn't I be parasailing? couldn't you be parasailing? couldn't he be parasailing? couldn't we be parasailing? couldn't you be parasailing? couldn't they be parasailing?
Perfect	V-ing perfect
couldn't I have parasailed? couldn't you have parasailed? couldn't he have parasailed? couldn't we have parasailed? couldn't you have parasailed? couldn't they have parasailed?	couldn't I have been parasailing? couldn't you have been parasailing? couldn't he have been parasailing? couldn't we have been parasailing? couldn't you have been parasailing? couldn't they have been parasailing?